I think that now the fedora project is more open to community, it's time to
really open it to all languages.
http://fedora.redhat.com/about/rhel.html says about Fedore Core:
Users: Early adopters, enthusiasts, developers
How big a percentage of the above-mentioned user group does not speak
English?
Note that it's about being able to read/speak/write English, it has
nothing to do with "US" or not.
My personal belief is that most of the internationalization efforts are of
very low priority for that particular user group.